Aeroacoustic Noise Modeling ANSYS Fluent

Simulation of Flow-Induced Aeroacoustic Noise

In this tutorial, we provide guidelines for modeling and simulation of Aeroacoustic Noise induced by 2D turbulent flow across a circular cylinder. For this aim, we use flow-induced (aeroacoustic) noise large eddy simulation (LES) to compute aeroacoustic noise. In addition, we will become familiar with the use of the Ffowcs Williams and Hawkings acoustics tool on a 2D case.

You will also learn how to do the following through this tutorial:

2D large eddy simulation in ANSYS Fluent

Selecting parameters for an aeroacoustic calculation

Performing acoustic calculation after saving acoustic source data

Obtaining acoustic pressure signals

Post-processing and analyzing the aeroacoustic results

Problem Description for Aeroacoustic Noise modeling

Here we model a turbulent air flow over a 2D circular cylinder with the diameter of 1.9 cm. The free stream velocity is 69.2m/s and the Reynolds number based on the diameter is 90,000.

We export the sound sources during the flow calculation. As a result, we are able to recalculate the acoustic signals for different receivers or model parameters. This approach significantly reduces the computational costs.

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